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Preheat oven to 400 degrees.
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Use a baking spray to prep your doughnut pan.
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Set the pan to the side.
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Whisk together the flour, baking powder, baking soda, cinnamon, salt and sugar in a large bowl.
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Whisk together the whole milk, sour cream , and eggs into a separate bowl.
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Whisk in the melted butter, vegetable oil, and vanilla
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Gradually whisk in the wet ingredients into the dry ingredients and stir just until combined
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Spoon the batter into the doughnut pan.
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Bake at 400 degrees for 9 minutes.
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Allow doughnuts to cool a few minutes in the pan.
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Transfer the donuts to a wire rack to completely cool.